Diptera.info :: Identification queries :: Diptera (adults)
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 Psilidae, Psilosoma sp.
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| Gerard Pennards |
Posted on 08-08-2010 16:39
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 Member Location: Amersfoort Posts: 1914 Joined: 07.06.04 |
In the high north of Russia near Vorkuta I caught a pair of Psilids in the genus Psilosoma (male with enlarged hind femora). As you can see the hind femur of the male is enlarged and arched, and it also has strange processes on the ventral base of this hind femur. It is not P. lefebvrei (hind femur looks different according to Bei-Bienko), so according to Fauna europaea it should be P. audouini. Or is it something else? Greetings Female Gerard Pennards attached the following image:  [97.83Kb] Edited by Gerard Pennards on 08-08-2010 16:47 Greetings, Gerard Pennards |
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| Gerard Pennards |
Posted on 08-08-2010 16:40
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Member Location: Amersfoort Posts: 1914 Joined: 07.06.04 |
Male
Gerard Pennards attached the following image:  [82Kb] Greetings, Gerard Pennards |
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| Gerard Pennards |
Posted on 08-08-2010 16:40
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Member Location: Amersfoort Posts: 1914 Joined: 07.06.04 |
Hind femur of male
Gerard Pennards attached the following image:  [76Kb] Greetings, Gerard Pennards |
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| Stephane Lebrun |
Posted on 08-08-2010 21:19
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 Member Location: Le Havre, France Posts: 8248 Joined: 03.03.07 |
I agree with Psilosoma audouini. Differing from P. lefebvrei by having no orbital and no dorsocentral (prescutellar), plus characteristic femur in male. The male is illustrated in Seguy (Faune de France no 28).
Stephane. |
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| Gerard Pennards |
Posted on 09-08-2010 09:11
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Member Location: Amersfoort Posts: 1914 Joined: 07.06.04 |
Many thanks Stephane! I looked at the russian keys of Bei-Bienko but there only lefebvrei was mentioned, and it's hind femur didn't look like this. I also have the Faune de France nr. 28 so I saw the drawing of P.audouini. I didn't realise this species could also occur in France, because it was found way up North! greetings Greetings, Gerard Pennards |
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